Party of four were rappelling down steep gully in North Cascades park when equipment failed, killing three at sceneThree climbers from suburban Seattle were killed in a fall on Sunday when their equipment failed while rappelling down a steep gully in North Cascades national park in Washington state, sheriff’s officials said.A party of four climbers was descending the gully in the area of North Early Winters Spire when the fall happened. Sheriff’s officials presume the cause was an anchor failure but are still investigating. Three of the climbers – ages 36, 47 and 63 – were killed at the scene